It's fine! Late night forum reading does that to me sometimes!
And gee, thank you! For whatever reason I never even thought about using Arena Trap/Shadow Tag! I already have a Static Flaaffy to use but it never occurred to me that as long as I switch in a Dugtrio or something that I can stop it Teleporting, though I'll still use a Masterball if Struggle becomes a problem. I'll definitely search on Route 203 now! Just gotta take extra care to inspect it carefully whenever I encounter one!
Good luck on your Badge Quest too btw, your currently searching in the same area as I plan to for your 5th shiny XP
Yep, Arena Trap prevents the use of Teleport, according to bulbapedia. And I succeeded in getting a shiny Starly there, so you should be fine.
I am at 3,702 REs in Eterna Forest. I am slowing down due to schoolwork, but I can get to 3,800 by tonight. Good luck and a blanket CONGRATS to all who got a shiny (and don't worry, I noticed the Golduck =P).